1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2004 Mark R V Murray
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer
12 * in this position and unchanged.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <sys/systm.h>
30 #include <sys/kernel.h>
31 #include <sys/lock.h>
32 #include <sys/malloc.h>
33 #include <sys/memrange.h>
34 #include <sys/sx.h>
35
36 static struct sx mr_lock;
37
38 /*
39 * Implementation-neutral, kernel-callable functions for manipulating
40 * memory range attributes.
41 */
42 void
mem_range_init(void)43 mem_range_init(void)
44 {
45
46 if (mem_range_softc.mr_op == NULL)
47 return;
48 sx_init(&mr_lock, "memrange");
49 mem_range_softc.mr_op->init(&mem_range_softc);
50 }
51
52 void
mem_range_destroy(void)53 mem_range_destroy(void)
54 {
55
56 if (mem_range_softc.mr_op == NULL)
57 return;
58 sx_destroy(&mr_lock);
59 }
60
61 int
mem_range_attr_get(struct mem_range_desc * mrd,int * arg)62 mem_range_attr_get(struct mem_range_desc *mrd, int *arg)
63 {
64 int nd;
65
66 if (mem_range_softc.mr_op == NULL)
67 return (EOPNOTSUPP);
68 nd = *arg;
69 sx_slock(&mr_lock);
70 if (nd == 0)
71 *arg = mem_range_softc.mr_ndesc;
72 else
73 bcopy(mem_range_softc.mr_desc, mrd, nd * sizeof(*mrd));
74 sx_sunlock(&mr_lock);
75 return (0);
76 }
77
78 int
mem_range_attr_set(struct mem_range_desc * mrd,int * arg)79 mem_range_attr_set(struct mem_range_desc *mrd, int *arg)
80 {
81 int ret;
82
83 if (mem_range_softc.mr_op == NULL)
84 return (EOPNOTSUPP);
85 sx_xlock(&mr_lock);
86 ret = mem_range_softc.mr_op->set(&mem_range_softc, mrd, arg);
87 sx_xunlock(&mr_lock);
88 return (ret);
89 }
90